/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.io;



import com.bff.gaia.unified.sdk.coders.AtomicCoder;

import com.bff.gaia.unified.sdk.coders.Coder;

import com.bff.gaia.unified.sdk.coders.VarIntCoder;

import com.bff.gaia.unified.sdk.io.fs.MatchResult;

import com.bff.gaia.unified.sdk.io.fs.MetadataCoder;



import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;



/** A {@link Coder} for {@link FileIO.ReadableFile}. */

public class ReadableFileCoder extends AtomicCoder<FileIO.ReadableFile> {

  private static final ReadableFileCoder INSTANCE = new ReadableFileCoder();



  /** Returns the instance of {@link ReadableFileCoder}. */

  public static ReadableFileCoder of() {

    return INSTANCE;

  }



  @Override

  public void encode(FileIO.ReadableFile value, OutputStream os) throws IOException {

    MetadataCoder.of().encode(value.getMetadata(), os);

    VarIntCoder.of().encode(value.getCompression().ordinal(), os);

  }



  @Override

  public FileIO.ReadableFile decode(InputStream is) throws IOException {

    MatchResult.Metadata metadata = MetadataCoder.of().decode(is);

    Compression compression = Compression.values()[VarIntCoder.of().decode(is)];

    return new FileIO.ReadableFile(metadata, compression);

  }

}